russell



O. L; RUSSELL coucn ROLL JACKET Nov. 3, 192 1,559,785

Filed Dec. 4, 1924 bye/r6602" Patented Nov. 3, 1925.

UNITED STATES,

PATENT OFFICE.

OSCAR L. RUSSELL, OF ALBANY, NEW YORK, ASSIGNOR TO F. C. HU'YCK & SONS, OF BENSSELAER, NEW YORK, A CORPORATION OF NEW YORK.

COUCH-ROLL JACKET.

Application filed December 4, 1924. Serial No 753,832.

tains to make and'use the same.

The invention relates to felted woolen jackets such as are used on the couch or press rolls of paper making machines.

In making woven felted jackets for the couch or similar rolls of paper making ma chines, it is customary to so weave the multiple ply woolen fabric of the jacket that when the jacket is fulled, its internal diameter will be some 28 to 30 percent smaller than the diameter of the roll on which it is to be used. The jacket is then stretched so that it is slightly larger than the roll and is dried while thus stretched so that it may be readily slipped over the roll. When the jacket is to be used, it is slipped over the roll and then soaked with hot water which causes it to shrink and tightly hug the roll so that it is firmly held thereon. In order that the jacket may have the tensile strength to enable it to be so shrunk onto the roll that it will be properly held thereon, it hasd1ere tofore been woven of comparatively coarse fibre wool, particularly in making jackets for large machines. Pressed felt jackets have been used to some extent since they have a smoother surface which is more easily cleaned and which gives a better finish to some qualities of paper.- These jackets,

however, have not the requisite tensile strength to enable them to be shrunk upon the rolls in such manner that they will be uniformly and properly. held thereon and are not as dependable as the woven jackets. The user never'knows whether they will disintegrate or go to pieces within a few hours or will act efiiciently.

-The present invention provides a felted jacket which has the advantages of both types of jacket above referred to without the disadvantages of either and which is well adapted for use on either large or small machines and which will act in a uniformly reliable manner'under conditions which prolong its life and also permit the width of the sheet produced to be varied at will. This is accomplished by weaving one or more of the inner plies of the interwoven multiple plies of the jacket of comparatively coarse fibre wool and weaving one or more of the outer plies of comparatively fine fibre wool. A jacket constructed in accordance with the invention is illustrated in'the drawing which shows a fragmentary section of a jacket applied to a couch or press roll.

' The jacket, as indicated in the drawing, comprises one or more plies woven ofcomparatively coarse fibre wool indicated at 2 and one or more plies woven of comparatively fine fibre wool indicated at 4. The plies may be interwoven and the jacket fabricated as usual and in accordance with the best practice dictated by the experience of the manufacturer. It is fulled, felted, stretched and dried as usual and is shrunk onto the roll indicated at 6 in the usual manner.

'The inner ply or plies of comparatively coarse fibre wool give to the jacket the tensile strength requisite to enable it to be so shrunk onto the roll that it will hug and .grip the roll with sufficient force to hold it in place during continued use. The outer ply or plies of fine fibre wool when fulled and felted presents a smooth even closely felted surface which acts efliciently upon the paper stock and gives an improved finish to the paper. This surface is also more easily cleaned than the rougher and more uneven surface of the prior felted jackets woven throughout of'a comparatively coarse fibre wool. Consequently the guard-board cleaning blade need be forced against the surface of thejacket with but a comparatively light pressure in order to remove therefrom the water and stock with a resulting decrease in the friction and abrasion and increase in the life of the jacket. The varia tion in the wear between theportions of the jacket which are covered by the paper and the uncovered end portions is also so reduced that the deckle may be changed as without increase in the pressure applied to the guard-board cleaning blade. This also adds to the life of the jacket and to its uniform and eificient operation throughout its life. 7

It is apparent that with the described construction of jacket that character of wool fibre which will act most efficiently is incordesired to change the width of the sheet h porated in the jacket where it may effect its desired function, and a jacket provided which is applicable to small and large machinesand which has a prolonged life and increased efliciency.

What is claimed isi 1. An interwoven -mu1tiple ply felted jacket for couch or similar rolls of paper making machines comprising one or more inner .plies of comparatively coarse fibre wool and'one or more outer plies of comparatively fine fibre wool.

ple ply felted jacket shrunk thereon in 15 which one or more of the inner plies are woven of comparatively coarse fibre wool to 7 cause the jacket to forcibly grip the roll and one or more outer plies of which are woven of a comparatively fine fibre wool to give a smooth, even, closely-felted, surface. In testimony whereof I have signed my name to this specification OSCAltL. RUSSELL. 

